对称氮氧配体钛配合物合成及催化丙交酯开环聚合研究

Synthesis and catalytic behaviors of a new Ti complex supported by unsymmetric N,O ligand

非对称氮氧多齿配体与四异丙氧基钛在甲苯中反应制得新颖的钛配合物。配合物的结构经红外光谱(IR)、紫外光谱(UV)表征。由于电子排布改变,配合物的紫外吸收光谱E2吸收带的吸收峰位置发生了红移,且吸收强度有所增强。该配合物用于D,L-丙交酯开环聚合反应,具有中等程度的催化活性,可制得分子量分布较窄的聚合物。

A Ti complex was synthesized by the reaction of an unsymmetric N,O ligand with Ti（OiPr）4 in toluene. The structure of Ti complex was characterized by IR and UV. The results showed that the peak in the optical absorption spectra appeared a red-shift and increased intensity of absorption. The Ti complex was active as catalyst for Ring-opening polymerization of D,L-lactide, and polymer with narrow polydispersities was produced.